Black to move. How to play?
Bd4 to move the white king to the corner of the board.
1)Bd7 to bring the rooks on the half open b and c files, thus starting to put pressure on white's queenside.
2) Bd4+ Kh1 Bd7 ... with the same idea.
3) ( not that good) f5 exf5 Bxf5, trying to bring the bishop on the active b1h7 diagonal and accelerating the developement of rooks.
I remember the concept!
Forcing opponent's king to corner is always great in these kind of structures so he will have to lose a tempo in future king's activity.
In last stream about opening mistakes your student played Bd4+ and he missed that white can play Kf1 so there Bd4 was useless because of the f1 square.
Here in this position rook is on f1 so it's good idea to force him to go to corner first then Bd7. So the move is Bd4+ here.